Exhibits: Plastic Rings, Pvc Cover, Paper Cover, Double Wire.

展品：装订胶圈，装订胶片，皮纹纸，双铁圈。

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Design principle, structure, operation and maintenance of ZNS3 double wire decker were introduced in this paper.

介绍了ZNS3双网脱水机的设计原理、结构、操作与维护。

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The principle, applications and process of TANDEM double wire welding for butt welding in shipbuilding were introduced.

介绍了TANDEM双丝焊在造船拼板焊接中的原理、应用和工艺。

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Along either side of the road lay broad swathes of landmines and a double fence of barbed wire that stretches the 151-mile (248 km) length of the DMZ.

CNN: Bush peers into 'evil' North Korea

"Most of us would want to help a friend in need, but if it's an online friend, and they want you to wire money, you should double-check, " FBI spokesman Jason Pack said.

CNN: Facebook, Twitter crooks just a click away

Tosca runs up a flight of stairs into the tower, and then a stunt double leaps from a window and, thanks to a wire, stops in midair.

NEWYORKER: Fiasco